[en] This thesis is about the impact of land conversion for industrialization on household livelihood strategies in Hung Yen province, northern Vietnam. The study shows that land conversion is generating a household landholdings decline while boosting the land market. After land conversion, 16% of laborers in the surveyed households find employment in industrial factories while 52% find jobs in the informal sector. Because of land conversion, rather than being net food producers, peasant households have become net food purchasers. Meantime, food safety in industrial areas is threatened by increasing environmental pollution. The findings also demonstrate that 51.9% of the surveyed households choose diversification as a livelihood strategy while 35.6% of them shift entirely to non-farm strategies. Among the affected peasant groups, households with a non-farm background that lost less than 50% of their agricultural land are likely to be in a better position to engage in lucrative non-farm jobs. Land conversion is causing a complex agrarian transformation in Vietnam. On the one hand, it generates a mechanism of social differentiation which is determined by land alteration and capital accumulation from high earning non-farm activities. On the other hand, peasant livelihood strategies, thanks to adaptation and innovation, have mitigated the impacts of land conversion and reveal the persistence of a peasant economy.